γδ T-PD-1 Ab Cells in the Treatment of Malignant Meningioma

Patients will receive 6 cycles of ex-vivo expanded γδ T-PD-1 Ab cells treatments,at two-weeks' intervals.γδ T-PD-1 Ab cells are injected through the Ommaya device in a typical 3+3 dose-escalation design(Dose escalation, 1×10\^7, 3×10\^7, 1×10\^8).